Building construction



July 10, 1923.

I J. A. PR ITCHARD BUILDING CONSTRUCTION 2 Sfleets-Sheet 1 Filed May 27, 1921 a citizen of the United States, residing in I of Illinois,

mama July 10, 1923.

v UNITED STATES PATIENT OFFICE.

JOHN A. PRITCHARD, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, 1'0 STRUCTURAL GYPSUM CORPORATION, OF NEW YORK, N. Y., A CORPORATION 01' DELAWARE, i I i BUILDING CONSTRUCTION..

Application 1115a May 27, 1921. Serial no. 47am,

To all whom it may concern: 'reenforcing members or wires and trans- Be it known that I, JOHN A. PRITGHARD, "erse reenforcing members 12.

The intermediate. slabs b are supported Chicago, in the county of Cook and State at their ends by have invented an Improvement only one of whlch is shown, and the end in Building Construction, of which the -folslabs'a are supported at one end upon an lowing description, in connection with the intermediate purlin 13 and between its ends accompanying drawings, is a specification, by an end purlin 14, which latter may be like characters on the drawings representing separated from the intermediate purlin 13 ike arts.

Th is invention relates to a building conbetween adjacent intermediate purlins. struction and more particularly to the roof The end slabs a are made of greater length and floors thereof when made of reenforced than the span between the purlins 13, 14 so plastic material, such as gypsum, concrete as to project beyond the end purlin any deand the like. sired or required distance to form the over- The invention has for its object to prohanging portion 16.

vide "a novel construction of slab and par- The end slab in accordance with this inticularly a preformed slab, which may provention is provided with one or more holes. ject beyond its support any desired or reor openings 17, preferably extended through quired distance and have the slab anchored it from top to bottom and removed from to its support without extending the steel the outer end of the slab at such distance as frame of the building. To this end, the will bring the holes or o enings over the slab, preferably a preformed slab, is pro end purlin 14, which is e ected by 'lacin vided with one or more openings extended in the mold (not shown) in which t e en from the bottom of the slab, preferably to slab is formed, suitable core blocks, which the top thereof, and is-further provided Wi h are located away from the inner end of the an anchoring rod which is em edded in h mold a distance substantially equal to the slab and is extended across sald opemng distance between the end purlin 14 and the openings, and is arranged wi h r l i n next adjacent intermediate purlin 13. In

sufiicient. portion of a .bodying the invention to enable it to be un force for the-overhang1ng in embodying this invention.

the latterso as to permit theanchoring rod the manufacture oLthe precast slab, the to be engaged with an anchorlng device or transverse reenforcing mgmbers 12 are posimember attached to the purlin or other suptioned in the mold as are also the longiby the desired or normal distance or span I intermediate purlins 13, w

port,- when the slab is laid in place upon tudinal. reenforcing members 10, and the the latter. outer end transverse reenforcing member 12 These and other features of this invenis preferably made as a rod and is located in tion will be pointed .out is the claims at the the mold a distance from the inner. end of end of-this specification. I the latter which is substantially e ual to Fig. 1. is a view of a portion of a. buildthe length of the span between t e end purlin 14 and the next intermediate purigs. 2 and 3, details of a core and core lin 13. The longitudinal reenforcing memcover to be referred to. bers 10 are connected with the outer end Fig.4, a Ian on an enlarged scale of a transverse reenforcin'g member 12, which I portion of t e end slab shown in Fig. 1, maybe efl'ected as shown by coiling the reand Fig.5, a section on the line 5-5, Fig. 4. In the present instance I enforcing members 10 around the outer end door or roof emthe outer member 12' so as to form a reenportion 16 of the derstood. The floor or roof is preferably end slab. When the reen orcing members composed of a plurality of individual or have been properly positioned in the mold,

precast end slabs a and intermediate slabs b a core block 18 of the desired size and pro each providedwith longitudinallv extend vided with a slot 19,. see Fig. 2, is placed 1n transverse member 12 and extending the have shown a outer free ends-of the members 10 beyondj the mold so as to straddle the outer end reenforcing member 12.

After the core block 18 has been placed in position, gypsum or other plastic material is poured or cast into the mold to form the slab. To facilitate removal of the core block from the cast slab, after the latter has set sufficiently, the core block may be provided on its outer surface with a layer of grease or as preferred with a layer of paper 20, which may be in the shape of a box or envelope open at its top and bottom and of a size to fit the core block as shown in.

Figs. 2, 4 and 5. The box or envelope 20 is provided in its sides with slots 21 which register with the slot 19 in the core block.

When the plastic material has set sufficiently, the core block 18 is readily removed and the paper cover 20 remains in the open ing. The end slab thus made is laid upon the purlins 13, 14 and anchoring devices 22 are adjusted on the purlin 14 so as to enter the openings and engage the outer transverse reenforcing member 12,. which constitutes an anchoring member for the longitudinal reenforcing members 10. The anchoring devices 22 may and referably will be ma-deas herein shown an each consists of a metal member provided with a slot 23 to permit the metal member to be engaged with the flange 24 of the purlin and be erected thereon. The metal member 22 is provided with a finger or projection 25 which is designed to extend upwardly between the anchorin rod 12 and the inner end'ofthe'opening 1 as shown in Figs. 4

I and 5.

After the end slab a has been placed in .position on the purlins 13-14, the holes or openings 17 in the slab are filled with plastic material 26 to provide the end slab with a smooth unbroken ripper surface, as represented in'Fig. 1. he longitudinal reenforcing members 10 of the slabs in longitudinal alignment and supported by the intermediate purlins '13, may be connected together, as" represented in Fig. 1, to form a continuous longitudlnal reenforcement extended from end purlin to end purlin and anchored to the latter, while providing the end slabs with overhanging portions 16 which project beyond the end purlins. I

Claims:

1. In a building construction, in combination, an end purlin, an anchoring device erected upon said end purlin, a slab of plastic material supported by said purlin and having an opening into which said anchoringdevice projects, and provided with an anchoring member extended into said opening and cooperating with said anchoring device.

1 2. In a building construction, in combination, an end purlin, an anchoring, device erected'upon said purlin, a slab of plastic material supported by said purlin and having an' opening into which said anchoring device projects, and provided with an anchoring member extended into said opening and cooperating with said anchoring device, and a reenforcing member for said slab connected with said anchoring mem 4. In a building construction, in combi- I nation a precast slab of plastic material provided with an opening and having an anchoring member embedded in the slab and extended into said opening, a support for said slab and an anchoring device connected with said support and extended into said opening and engaged with the anchor ing member embedded in said slab.

In testimony whereof, I have signed my name to this specification.

' OHN A. PRITCHARD. 

